This section is from the book "The Gardener's Monthly And Horticulturist V18", by Thomas Meehan. See also: Four-Season Harvest: Organic Vegetables from Your Home Garden All Year Long.
From circumstances that had come before us, we were led to believe that the hemlock did not do well in some parts of England and elsewhere, because of limestone land. The Country Gentleman notes instances of perfect success with the hemlock in limestone land in Western New York. The poor success of the hemlock at Rochester was one of the reasons for our original conclusion. It would be singular if it should turn out that not even the rhododendron objects to limestone, in spite of the prevalent impression.